This book definitely caters to the advanced user, and is not for the faint of heart. You are expected to have a good grasp of object-oriented programming and the Java programming language ...

by converting an example of object-oriented Java code to its functional equivalent. I found the book Introduction to Functional Programming (Richard Bird and Philip Wadler, Prentice Hall ...

The beginner-friendly bundle will introduce you to object-oriented programming, Java programming, Java design patterns, and more. You’ll also learn how to build modern distributed systems ...